Worst air pollution Viterbo, today and tomorrow
Today (16 July): Air quality in Viterbo is medium. AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 AM (NO2: 49.4/100).
Tomorrow (17 July 2026): Air quality in Viterbo is fair. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 5:00 AM (NO2: 54.6/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Viterbo's air quality reflects the Viterbo plain at the edge of the volcanic Cimini hills in northern Lazio, with vehicle traffic on the A1 motorway and surrounding thermal spa, agriculture, and manufacturing contributing local sources. The Cimini hills and the Monti Volsini volcanic highlands create topographic variation, while the Tyrrhenian coastal influence provides periodic ventilation and the flat Latium countryside generally maintains moderate conditions throughout the year.
Today - 16 July | Pollution peaks at 05:00
AQI:
Medium
49.4/100
PM2.5 (fine particles):
Good
19.3/100
PM10 (coarse particles):
Good
13.6/100
NO2 (nitrogen dioxide):
Medium
49.4/100
O3 (ozone):
Medium
42.0/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.3/100
PM1 (ultrafine particles):
Good
14.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 05:00
AQI:
Medium
54.6/100
PM2.5 (fine particles):
Fair
23.2/100
PM10 (coarse particles):
Good
16.5/100
NO2 (nitrogen dioxide):
Medium
54.6/100
O3 (ozone):
Medium
44.8/100
SO2 (sulfur dioxide):
Good
5.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.3/100
PM1 (ultrafine particles):
Good
19.9/100
Pollen forecast in Viterbo
View pollen forecastFrequently Asked Questions
Is air quality bad in Viterbo right now?
On 16 July 2026, overall air quality in Viterbo is medium. AQI is the main air quality indicator at 49.4/100. Pollution peaks around 5:00 AM (NO2: 49.4/100).
Will air quality be worse tomorrow in Viterbo?
On 17 July 2026, air quality conditions in Viterbo will be worse than today, with PM2.5 forecast at fair at 23.2/100. Pollution peaks around 5:00 AM (NO2: 54.6/100).
When is air pollution at its worst in Viterbo?
The most noticeable dips in Viterbo's air quality come when oak and linden pollen peaks, or because of vehicle traffic on the A1 motorway and nearby thermal spa, agriculture, and manufacturing; conditions generally improve once the season shifts and rainfall or stronger winds return.
Are air quality levels in Viterbo based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app